1. Instanced Mesh Is Sometimes Invisible in Scene View

If the instanced mesh is occasionally invisible in the Scene view, try refocusing the Unity application. If you make changes to assets, Unity may sometimes clear non-serialized material data. Refreshing them is necessary to render our Instanced Animator after clearing.

On HDRP and URP, visibility behavior can be somewhat random due to SRP construction.

2. During Playmode, My Instanced Renderers Are Invisible

First, check cameras - ensure that one of them does not block the visibility of others.

Second, check in project settings for the status of Render Only to Current Camera. If this option is enabled, only BlackRoseProjects.InstancedAnimationSystem.InstancedAnimation.CurrentCamera will see Instanced Renderers. Therefore, you need to control which camera is stored in this field.